Boots – shoes – and leggings
Patent
1993-10-22
1996-01-16
Chin, Gary
Boots, shoes, and leggings
364449, 364461, 340435, 180170, 180179, G06F16500
Patent
active
054853818
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a navigation device for land vehicles, particularly passenger cars and trucks, having a storage for geographical data, sensors for detecting existing travel data, a comparison device, and an information delivery device. The present invention is also related to a method of providing road information to drivers of land vehicles in which geographical data are compared with actual travel data, and, in the event of dangerous situations, a warning is given to the driver.
Navigation devices for land vehicles, also referred to as orientation systems, are known. They assist the driver of the vehicle in finding his way in unknown territories and furthermore of timely noting dangers.
In the known devices, danger-relevant data from the information with regard to the road being traveled are stored, as well as recommended speeds which should be complied with in these regions. It is readily apparent that with the large amount of information which may have to be made available to the driver by such devices, extensive storage devices must be provided, which makes it difficult to integrate such devices in land vehicles, and at least result in a high cost for such systems. Hence, there is a need for a land vehicle navigation device which has reduced storage requirements but which remains safe.
SUMMARY OF THE INVENTION
The navigation device in accordance with the present invention as well as the method of the present invention for supplying road information have the advantage over the foregoing in that the need for storage is reduced, so that easier integration in land vehicles at reduced cost is possible, without leading to a reduction in the safety of traffic.
Since safety-relevant data, for instance the limit speed, for travel over a future path are calculated from the geographical data stored by the navigation device, the storing of such data is no longer necessary, without reducing the safety of the system or the method of the present invention. For this purpose the navigation device has a calculating unit which determines the limit speed for the further travel from geographical data concerning the course of the road. A comparison device serves to compare the instantaneous speed of the vehicle with the calculated limit speed and possibly activate and information delivery device which advises the driver of a difference between the instantaneous speed and the limit speed.
A preferred embodiment of the navigation device is characterized by a calculation unit which, for the determination of a safe limit speed which should be complied with for travel over a path lying in front of the vehicle, evaluates edges and angles of a fixed reference system by which the section of the road between two base points is defined. From the length of an edge piece, the curvature associated with the one base point can be calculated and from this there can be determined the limit speed at which this portion of the road can be safely traveled over. At this speed, therefore, the maximum adhesion coefficient is not exceeded, so that the vehicle does not skid. Therefore, assurance is furthermore had that a maximum transverse acceleration of the vehicle cannot be exceeded. A comparison device of the navigation system compares the instantaneous speed of the vehicle with the calculated limit speed and, in the event of a difference between the two, activates the information delivery device so that the driver is warned of threatened dangers.
In a preferred embodiment of the navigation device, a conversion device can be activated jointly with the information device or as an alternative to it, it controlling setting members of the vehicle, for instance displacing an electronic gas pedal in such a manner that the vehicle is decelerated. It is also possible for an automatic transmission to be controlled or for the brakes of the vehicle to be placed in action.
Other possible developments of the navigation device are discussed in the DETAILED DESCRIPTION.
In one preferred embodiment of the method
REFERENCES:
patent: 5146219 (1992-09-01), Zechnall
patent: 5229941 (1993-07-01), Hattori
patent: 5230400 (1993-07-01), Kakinami et al.
patent: 5315295 (1994-05-01), Fujii
Geiser Georg
Heintz Frieder
Winner Hermann
Chin Gary
Robert & Bosch GmbH
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